[Visualpython-users] Correction

[Bruce S. <bas...@un...>]

I made a mistake in the deployment of the color stereo versions 
yesterday, now corrected (Win/Linux/Unix/OSX). And by the way, public 
thanks to Rob Salgado for bringing up the possibility of color stereo 
with red-cyan or yellow-blue glasses.

In the current implementation fully saturated object colors are 
displayed with 50% saturation, which ensures that both eyes have 
something to see. With the 50-cent red-cyan paper glasses I have, the 
cyan filter almost perfectly excludes all red, but the red filter allows 
quite a bit of green through, making ghosts in the view seen by the left 
eye. These ghost images are more or less noticeable/annoying/distracting 
depending on the details of how extreme the stereo is, the background, 
etc. Even with shutter glasses there are some ghosts, though typically 
less noticeable. However, shutter glasses plus a special graphics card 
are a lot more expensive, and there is flicker unless you can drive the 
monitor at a very high repetition rate.

It would seem worthwhile to see whether it would be possible to find a 
red filter that passes plenty of red light yet excludes almost all green 
(and blue). I don't know whether this is feasible, given the overlap in 
sensitivity of the red and green receptors in the eye.

Bruce Sherwood